US warplanes have carried out new air strikes on Islamic State (IS) militants in Iraq and Syria, hitting vehicles and arms dumps, the USmilitary says.
Eight IS vehicles were damaged near Abu Kamal on the Syria-Iraq border, and two others in Deir al-Zour in the east of Syria, the US Central Command said.
In Iraq there were strikes on IS targets west of Baghdad and southeast of Irbil, near Kurdish territory.
Earlier there were air strikes on IS near the border with Turkey.
US President Barack Obama has condemned IS "fanaticism", in a speech to the UN General Assembly in New York.
"There can be no reasoning - no negotiation - with this brand of evil. The only language understood by killers like this is the language of force," he said.
He urged Muslims to reject the ideology of IS and al-Qaeda.
He said the US "will work with a broad coalition to dismantle this network of death.
"In this effort, we do not act alone. Nor do we intend to send US troops to occupy foreign lands. Instead, we will support Iraqis and Syrians fighting to reclaim their communities. We will use our military might in a campaign of air strikes to roll back Isil [IS].
"We will train and equip forces fighting against these terrorists on the ground. We will work to cut off their financing, and to stop the flow of fighters into and out of the region. Already, over 40 nations have offered to join this coalition. Today, I ask the world to join in this effort," he said.
The well-armed Sunni Muslim IS militants have seized large areas of Syria and Iraq, vowing to establish a hardline caliphate ruled by Sharia. They have beheaded Western hostages and have persecuted Christians, Yazidis and Shia Muslims, whom they treat as heretics.
Turkey border crisis
Syrian activists reported strikes around the Kurdish town of Kobane near Turkey, which has been besieged by IS fighters for several days.
Witnesses saw two military aircraft approaching from Turkey but Turkish officials denied its airspace or bases had been used in the attack.
The US-led coalition expanded its raids against IS into Syria on Monday. The US said Saudi Arabia, the United Arab Emirates, Jordan, Bahrain and Qatar had all "participated in or supported" the strikes.
But the aerial bombardment near Kobane, which happened at about 01:00 local time (22:00 GMT), has not been confirmed by the US or any coalition member.
Turkish military sources said neither its air force nor the US airbase at Incirlik in southern Turkey had been used.
The US has launched nearly 200 air strikes against IS in Iraq since August.
The IS advance has created a refugee crisis in neighbouring Turkey. Aid agencies said some 130,000 Kurdish refugees, most of them from Kobane, crossed into Turkey at the weekend.
The US air strikes on Tuesday also targeted Khorasan, a shadowy group of Al-Qaeda fighters in Syria's Aleppo province. The US military believes that attack killed Khorasan's leader Fadhli, a US official quoted by Reuters news agency said.